Ofcom published is final plans regarding the organization of spectrum during the 2012 London Olympic Games.
"As part of the UK's bid to hold the 2012 Games, the UK Government guaranteed the allocation of the spectrum required for the organisation of the Games. Ofcom is responsible for managing spectrum for the Games, in accordance with the Government’s guarantees".
See "Countdown to the London 2012 Games" - here. See also "UK 2012 Olympic Delegation: All Available Frequencies (and Athletes)" - here.